You can add money, at no cost, to your TransferWise Borderless Account from the Borderless account page which is shown in the menu at the top of the page.
If you already have money in the currency you wish to add, click on the currency to get the expanded view, and then click the Add button. Follow the instructions to add money in that currency.
If you don’t already have money in the relevant currency, you can add a new currency by clicking the Add an account button on the top right hand side of the page. After you’ve added the currency, you can add money using the process above.
Please note - due to local U.S.regulations, you can't currently add money to your USD balance using this process, unless you're a resident of a licensed state. Instead, you can receive a normal ACH or domestic wire payment to your USD balance details.
You also cannot top up your Borderless account from any of the following currencies: JPY and BRL.